We're talking Java API here:
Recently had a situation where a customer thought their WAS on z/OS had to be 31-bit (due to AFP2PDF being restricted to 31 bit).
This used to be true, but is no longer.
The ODWEK Java API does a spawn() of afp2pdf. For spawn(), it doesn't matter what AMODE afp2pdf is.
It >>>used to be<<< that ODWEK could invoke afp2pdf via spawn() or via function calls to the afp2pdf_shr DLL. For DLLs, AMODE does matter.
In that case, 64-bit code can't call functions in a 31-bit DLL. But CMOD doesn't do function calls anymore, so that's not an issue.
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For ODWEK java API, CMOD ships both 31- and 64-bit DLLs.
Either should spawn afp2pdf no problem using the java APIs.
Note: CGI/Servelt remains 31-bit only.
Ed